I'm need a micro with following requirements:UART - RS485inputs = 4outputs = 4Also need to drive a seven segment LED or dot matrix.Its for an remote operator station and the quantity is quite small,but may go to 1000 units over time.Its been awhile since my last project, so I'm not sure whats availabletoday.Would prefer an "all-on-board" chip if possible.Cost is a consideration but not overriding.KP

A bit more information would help.Any 8-bit processor currently available will do this job.Do you need to be battery operated ?Do you need a single chip solution ?Do you have any idea what you really want ??Do you need the lowest cost, size, code density, Ram requirements ??I am familiar with PIC, 8051, ( many manufactures ) and Motorola 8-bitters.Any of these will do this job !Last question, do you want to do this yourself or are you looking for an off the shelf product, or a consultant to build/program this for you ??Kim wrote:

which 8-bit micro

Jan 05, 2004 22 Replies

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Ulf Samuelsson 22 years ago

The Atmel ATtiny2313 is indeed a good choice for this application, if 20 pins seems to be enough. Otherwise you can look at the ATmega48 for 28 pins or the ATmega8515 for a 40 pin package.

You can download a free assembler/simulator/debugger at

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which is the best AVR website. The STK500 development board is all you need, but with the ATtiny2313 and ATmega48 you can connect the soon to be available JTAG ICE-Mk II using the single pin "Debugwire(tm)".

Best Regards Ulf at atmel dot com These comments are intended to be my own opinion and they may, or may not be shared by my employer, Atmel Sweden.

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Kim 22 years ago

Does the STK 500 development board support the ATtiny2313 . Its not listed in the brochure. It does seem like a good choice. KP

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Ulf Samuelsson 22 years ago

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It is pin compatible with the AT90S2313. The STK500 documentation has probably not been updated, since it is so new. There is no dedicacted connector for the DebugWire on the STK500 but since it is single wire, I think there will be a solution. Debugwire will need a JTAG emulator Mk II (soon to be available)

Until this is released (I was told January) it should be possible to use the normal ISP connector to program the part.

Best Regards Ulf at atmel dot com These comments are intended to be my own opinion and they may, or may not be shared by my employer, Atmel Sweden.

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